Recording the presence of these animals is sometimes neglected by ecologists, so Alien Encounters
aims to collate sightings to find out where non-native amphibians and reptiles occur in the UK.
This will help understand the extent to which these species have become established here.

You can help by reporting your sightings of alien amphibians and reptiles and, in particular,
four that are associated with water bodies and are relatively easy to identify: